美国人乔·恩格西亚的世界没有光。这位盲人从不知道电话的模样,更没办法准确地按下拨号键盘。但他用声音弥补了一切。早在他4岁那年,他就学会通过拍打一种名叫叉簧的小零件,代替电话按键拔号。再大一些,他甚至能用口哨吹出某个特定的音调,让长途电话局停止计费,从而免费拨打长途电话。上世纪中期,很多美国青年都在致力于学习恩格 The world of American Joe Ngosia has no light. The blind never knew the appearance of the phone, but no way to accurately press the dial pad. But he made up everything with his voice. As early as the age of 4, he learned to dial a number by dialing a small part called a hook-and-pop switch. Even bigger, he can even whistle a specific tone, so that the long-distance phone bill stop, so free long distance calls. In the middle of the last century, many American youth are devoting themselves to studying Engels